1994/08/30 Caterpillar

New Oil Pressure Regulating Valve Used In Oil Filter Group{1315}

Usage:

3176 (2YG, 7LG),
3176B (9CK) Truck Engines

Description of Change: A new oil pressure regulating valve is used in the oil filter group. The new valve has a metering chamfer (see the Illustration 1) to reduce pressure oscillations in the lubrication system. The new valve also has an increased length (see Illustrations 1 and 2) to better contain the pressure regulating spring and protect the spring from being over compressed during cold engine starts.

Illustration 1. New 111-2645 Regulating Valve. Location of metering chamfer (A). Length (X) = 118 mm (4.6 in).

Illustration 2. Former 7C-0803 Regulating Valve. Length (Y) = 91 mm (3.6 in).

Adaptable To: The new 111-2645 Regulating Valve is a direct replacement for the former 7C-0803 Regulating Valve in the 9Y-3899 Oil Filter Group. The new 111-2645 Regulating Valve is in effect with 3176B Truck Engine 9CK5652 and is adaptable to all earlier 3176 and 3176B Truck Engines. The former regulating valve is canceled.

The new 111-2645 Regulating Valve should ONLY be installed if the oil pressure oscillations are causing erratic oil pressure readings on the Service Tool Status Screen, or on a manual oil pressure gage. The oil pressure oscillations DO NOT cause any engine damage.

Caterpillar Information System:

1994/08/30 New 310A Jake Brake® Available{1119}

1994/08/30 December 1993 FLASH File Update And Fan Control Logic{1902}

1994/08/30 Service Procedure For 40 Pin Connector Seal{1901}

1994/08/30 Use Of 4C-4377 Stress Plate Group In 3116 Cylinder Block Reconditioning{0672,0673,1201}

1994/08/30 Changes To 3116 Truck Engine For 1994{0374}

1994/07/01 Fuel Injection Nozzle Spray Orifice Plugging{1254}

1994/07/01 Be Sure To Use The Correct Reverse Flow Check Valve{1251}

1994/06/24 Installation Procedure For 1R-0716 Engine Oil Filter{1318}

1994/06/24 Procedure For Lapping Sealing Surfaces Of Fuel Injection Pump Barrels And Bonnets{1251}

1994/06/24 New Valve Lifter Assembly Provide Improved Lubrication Of Lifter Roller And Camshaft Lobes{1209,1210}

1994/06/24 New Rocker Arm Adjustment Screw Used To Adjust Valve Clearance{1123,1100}

1994/06/24 New Intake And Exhaust Valves Used{1105,1100}

1994/08/30 False Logging Of Diagnostic Codes 100-01 (FC46) "Low Oil Pressure" And 100-11 (FC46) "Very Low Oil Pressure"{1902}

1994/08/30 Longer Studs And Spacers Used To Retain Exhaust Manifolds{1059}

1994/08/30 New Exhaust Manifolds, Longer Mounting Studs And Spacers Used In Exhaust Manifold Groups{1059}

1994/08/30 New Water Seals Used in 3400 Head Assemblies{1124}

1994/08/30 Changing Complete Sets Of Fuel Injection Pump Groups May Not Fix Low Power Problems{1251}

1994/08/30 Use Only Clean Engine Oil To Lubricate Unit Injector O-Rings{1290}

1994/09/01 Caterpillar Introduces New Long Life Heavy Duty Engine Coolant{1395}

1994/09/01 New Fuel Priming Pump And Gasket Used{1258}

1994/09/01 New Fuel Priming Pump Assembly Used In Fuel Priming Pump Group{1258}

1994/09/01 Improved Fuel Pump Bonnet Seal Has Better Heat Resistance{1251}

1994/09/01 Remanufactured 3400 Cylinder Heads Now Use Intake And Exhaust Valves With Chrome Plated Valve Stems{1105}

1994/09/01 Turbocharger Popping Noise Does Not Cause Damage{1052}